Water tank



FIG. 1.1 is a front view of a water tank showing the new design;

FIG. 1.2 is a back view of the water tank;

FIG. 1.3 is a left view of the water tank, while the right view of the same is symmetrical with the left view and is thereby omitted;

FIG. 1.4 is a top view of the water tank;

FIG. 1.5 is a bottom view of the water tank;

FIG. 1.6 is a perspective view of the water tank;

FIG. 1.7 is another perspective view of the water tank; and

FIG. 1.8 is a reference view illustrating a usage state thereof in a drinking water bar.

The broken lines in FIGS. 1.1, 1.2, 1.5 and 1.7 depict portions of the water tank that form no part of the claimed design.

The broken lines in FIG. 1.8 depict environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a water tank, as shown and described. 